Lubricant dispensing device



45 1932. E, W DAVls 1,880,857

v' LUBRICANT DISPENSING DEVICE Filed C.. l5, 1928 SShGG'LS-Shee'il 2 j 6524 Q 2] mp0' 6/ 62,95

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Oct. 4, 1932. E. w. DAvls 1,880,857

LUBRICANT DISPENSING DEVICE l@ 1 7 Je Patented Oct. 4, 1932 UNrr'n stars wenn Muur Fri." f

EENEs'r W. Davis, OE OAI:Y PARK, ILLINOIS, AssIGNOE To ALEMITE CORPORATION, OF

CHICAGO,Y ILLINOIS, A. CORPORATION or DELAWARE VLunaroiin'r nIsrE'NsING DEVICE vApplication.filed October 15, 1928. Serial 170.312,44.

My invention relates to lubricating apparatus and more particularly to lubricant pumps for removing Vlubricant from containers. Y

It is an object of my invention to provide a motor driven pump for removing lubricant from lubricant supply barrelsjV Another object of my invention is to provide in a motor driven pump for removing lubricant from a barrel, means to automatically stop the flow of lubricant from the pump independently of the motor anddrlving mechanism. 1

Another object of my invention is toprovide a; pump for removing lubricant from a supply barrel and having an intake so disposed relative to the center of the barrel as to readily aiiord changes of position whereby the barrel may be completely emptied.

Another object of my invention is to provide a pump for removing lubricant from` a supply barrel wherein the operating mechanism of the pump is so arranged as to be lubricated by the lubricant which passes from the supply barrel.

Still another obj ect of my invention is to provide'in a motor driven pump `for removing lubricant from a supply barrel7 means to prevent leakage of lubricant from the pump housing where the motor drive shaft enters the housing.

Other objects and advantages of my invention will .become more apparent through the following detailed description and accompanying drawings, in which Y Figure 1 is a side 4elevation of the lubricant pump of my invention, illustrating the manner in which it is mounted on a lubricant barrel which is shown in section;

Figurev 2 is another side elevation of my lubricant pump shown mounted on a lubricant barrel with the pump rotatedto a different position within the barrel;

Figure 3 is an enlarged cross sectional view ot my lubricant pump looking at it from the side; v p .A

Figure 4 is an enlarged end view of my pump partly in section;

igure is an enlarged cross section taken on the line 5-5 of Figure 3; and

threads 12 and extends up into the gear hous ing 9, and a lock nut 7 secures the cylinder 11 in position. The base 8 is adapted to snug-r ly t over a cover opening 13 in the top of a lubricant container or supply barrel 14 and rests upon the top of the barrel with the conduit cylinder 11 depending from the base 8 down into the barrel. A handle 15 is suitably secured to the supporting base 8 means Ofscrew studs 16 and this handlefacilitates moving lof the pump apparatus.

A geared crank disc 17 is rotatably mounted on a shaft 18 which shaft is screw threaded in the side of the gear housing 9 and secured bya lock nut 19. A worm gear 20, which meshes with the geared crank disc 17 is secured to aV shaft 21 which is rotatably'mounted at one end in a bushing 22 near the topof the housing 9. The other end of the shaft 21 Apasses through' a bushing 23 and is secured to a suitable flexible coupling 24 of any` wellv known type, which is in turn connected with a drive shaft 26 of the electric motor 10.

A crank pin 29 is suitably mounted on t-he crank disc 17, offset from the center of the crank disc. A connecting rod 3Q is connected with the crank pin 29 by means of a crank 31 which is rotatably mounted on the crank pin'29v and has a bore 32 in one end thereof to support the connecting rod 30 which is held yin place by a nut 33. The lower end of the connecting rod 30 extends ,downwardly within the conduit cylinder 11 which depends from the gear housing 9. vA pump cylinder 34 is suitably mounted at the lowerend of the conduit cylinder 11 by screw lthreads 35 and a pump piston 36 is securedto the lower end of asecond piston rod 37 byV means of a nut 38, and this pistonis adaptedto'reciprocate within the lower end of the pump cylinder 34. The piston rod 37 is reciprocably mounted in a spider 39 which is formed within the pump cylinder 34 andthe upper end of the piston rod 37 is apertured to receive a pin 40 which passes through a clevis 41 formed at the lower end of the connecting rod 30, whereby the rod and rod 37 are connected together. c Y I f It will be noted that the upper end of the rod 37 has been reduced in size so that the space withinthe bifurcated portions of the clevis willL allow for some rocking motion. The pin 40 will also be slightly less in diameter than the .aperture within'the upper end of the rod 37 to compensate for the rocking motion of the connecting rod 30 when the crank disc17fis in operation. The' pin 40 is in a position perpendicular to the crank pin29 which arrangement is possible because of the rocking motion just described. If the connection formed by the clevis 41 and rod 37 were relied on to` provide the motion necessary when the crank 31 is operating, the

` pin 40would have to be parallel to the crank pin 29 and in the same plane with this crank pin. In the assembly of the parts. and manufacture of the apparatus great care would necessarily have to be exercised .which would add to the time necessary to assemble one of the devices. y

The piston rod 37 may also move relative to the connecting rod 30 in a direction perpendicular to the plane of the rotationof the crank disc 17, because of its pivotal connection with the rod 30.

The upper end of the pump cylinder 34 is enlarged to provide roomrfor adiscY valve 42 which is reciprocably mountedupon the piston rod 37 and rests upona shoulder 43 formed within the pump cylinder and also upon the spider 39 therein. lA plurality. of apertures 44 are cut in the upper end of the disc valve 42 to allow passagefof lubricant thereby when the upward movement of the valve 42 islimited by its` engagement with the lower end of the conduit cylinder .11. Y The lower end of the pump cylinder 34 is iared out to form a bell-shaped housing 45 in the lower end of which are cut'openings 46 to allow for the passage of lubricant into the cylinder shouldthe bottom of the housing 45 rest upon the bottom of thelubricant container 14. n Y r The inner walls of the bell-shaped housing 45 are provided with serrated bosses 47 which serve as guide members for the pump piston 36 as it reciprocates within the pump cylinder 34. This construction allows the pump piston 36 tobe moved downwardly into the bell-shapedhousing 45 beyond the end of the pump cylinder 34 and allows passage of lubricant between the boss-es 47 so that lubricant may enter the pump cylinder 34.

A removable cap 50 is suitably secured at one side of the gear housing 9 by means lof studs 51, as shown in Figure' 4, to'provide an to allow discharge of lubricant or close it to prevent discharge at will. A wall 53 is formed within the gear housing'9 to'define a chamber within which is confined the driving mechanism of the pump. All lubricant raised from the container 14 passes through this chamber `before itA enters the discharge conduit 60 whereby the driving mechanism of thek pump is thoroughly lubricated' at all times. Y V Y Thewall 53 also forms a chamber 54 which is in alignment with anopening 55 located in the supporting base 8.' A bore 56 is formed in the wall 53 and aifords a seat for a. ball check valve 57 which is heldin position by a compression spring 58 set in ascrewplug59 which plug is screwthreaded into the gear housing 9. yThis ball check valve normally remains on-its seatyclosing the bore 56 so that lubricant which is raised bythe pumping mechanism will not enter the chamber 54 but will pass out through the discharge conduit 60. Whenthe lubricating operation is completed and the discharge conduit closed oft, the lubricant raised by the pumping mechanism may be discharged through the opening 56 into the chamber 54 by compression of the ball check valve and thereupon returned through the opening 55 into the container P14. y i f' Another feature of my invention' is the prevention of leakage of lubricant through the motor drive shaft opening-in lthe housing 9 byproviding a helical groove 65 on the shaft 21 at the place where it isV rotatably mounted in the bushing 23, and a chamber 61 is formed within the bushing 23., Cross drill holes 62 `are drilled in the bushing 23 so that as the shaft rotates the helical groove 60 will tend to return or screw back toward the worm gear 2O any lubricant which mightleak between the shaft 21 andbushing 23. Thus, the lubricant may fall back through the cross drill holes'62 intothe chamber 54 and-back into the container 14.

- In the operation of this device a container `full of lubricant is placed in a convenient cylinder'. As the pump piston 36 moves up` wardly thelubricant will be carried upwardly thereby through openings in the rspider 39, raising the valve l2 and passingthrough openings 44 into the conduit cylinder l1. As the pump continues to operate the conduit cylinder 11 will be filled and lubricant raised into the gear housing 9 from whence it is discharged through the discharge conduit 60 and into the transmission, diderential or bearing to be lubricated. As long asthe motor runs and the discharge out-let is open, lubricant will be raised from the container and forced outwardly as described,A under pressure, through the discharge conduit 60. When the discharge outlet is closed, the motor may be allowed to run continuously with no damage to any of the parts or overflow of e lubricant because of the ball check valve 57 and opening 56 through which the lubricant will be returned to the container lil. is the lubricant is removed from the container it will tend to cling to one edge of the container,

as illustrated in Figure l, which shows the approximate condition of a container after trated in Figure 2 where the inlet in the belli shaped housing 45 will be surrounded by the remaining lubricant in the container and con-` tinue to discharge lubricant from the container 14, the advantage of this construction being to allow a complete and eflicient removal of all of the lubricant contained within the supply barrel and also to prevent the annoyance of the sudden exhausting of the supply within'thecontainer without giving the operator some warning so that the lubrication of the particular mechanism being lubricated may be completed without the necesi sity of opening a new barrel and changing the pump mechanism before the particular job is completed.

The crank arrangement illustrated in my invention. with the crank pin offset from the center and the crank 3l arranged as shown, is to allow the pumping mechanism to be arranged close to the driving motor so that none of the parts will extend beyond the diameter of the lubricant supply barrel.

The invention is capable of wide variation within equivalent limits and I contemplate such variation as may be desirable or useful in the particular adaptation of the invention shown, or in its adaptation to other devices. Ido not restrict myself in any unessential particulars, but what I claim and desire to secure by Letters Patent is:

l. ln a lubricating apparatus of the class described, a supporting base including a circular bearing portion adapted to be placed concentricallyover a `large opening in the upper end of a lubricant container, av motor mounted on said base, a pump Acylinder on said base eccentrically of the axis of the base, depending therefrom and having a lubricant .inlet adjacent the bottom of the container eceentrically of the axis of the container, a. piston in said cylinder, a piston rod for said piston, a connecting rod forrecipprocatinc said piston rod having one end eX- tending through said base, a crank disc mounted above said base, operably connected to both said motor and said connecting rod for actuating said piston upon operation of the motor. i

2. in a lubricating' apparatus of the class described, a supporting base ,including a circular bearine- Jortionada` ted toV be laced concentrically over a large opening inthe upper end of a lubricant container, a motor mounted on said base, a pump cylinder on said base eccentrically of the axis of theY base,

depending therefrom and having a lubri-V ca t inlet adjacent the bottom of the container eccentrically of the axis ofthe container, a piston in said cylinder, a' piston rod` for said piston, a connecting rod for reciproeating said piston rod having one end extending through said base, a crank disc mounted above said base, operably ccnnectedfto bothr said motor and said connecting rodfor'ad tuating said piston upon operation of the` motor, a casing over said disc disposed to re- -eive lubricant from said cylinder, and means con municating with said casing for receiv ing and dispensing lubricantrtherefrom. 3. ln a lubricating apparatus of the class described, a supportii'ig base including a circular bearing portion adapted to be placed concentrically overv a. large opening in the upper end of a lubricant container, a motor mounted on said base, a. pump cylinder on said base eccentrically of the axis of the base, ,depending therefrom and having a lubricant inlet adjacent the bottom of the container eccentrically of the axis of the container', a piston in saidfcylinder, a piston rod for said piston, a connecting rod for reciprocating said piston rod having one end extending through said base, a crank discniounted above said base, opera-bly connected to both said motor and said connecting red for actuating said piston upon operation of the motor, a casing over said disc disposed to receive lubricant from said cylindermeans communicati g with said casing for receiving and dispens tending 'through said casing forming an overflow Vcompartment communicating with said container and yieldingly held valve means normally closing an opening through said partition to permit the return of lubricant to said container. Y

4. In a lubricating apparatus of the class described, a supporting base including a circular bearing portion ada )ted to be placed concentrically over a large opening in the upper end of a lubricant container, a motor mounted on said base, a pump cylinder oii said base eccentrically of the axis of the base, depending therefrom and having aA lubricant inlet adjacent the'bottoin of the container eccentrically of the axis of the'containei, a piston in said cylinder, a. piston rod for said piston, a connecting vrod for reciprocating said piston Yrod having one end extending through said vbase, a crank disc mounted above said base, means forming a driving connection between said motor and said disc for rotating said disc, an eccentrically disposed crank pin on said disc, and an. offset arm operably connecting said connecting rod to said pin whereby operation of theV motor actuates said piston.

5. In a lubricating apparatus of the class described, a supporting base including a circular bearing portion adapted to be placed concentrically over a large opening in the upper end of a lubricantfcontainer, a motor mounted on said base, a pump cylinder on said base eccentrically of the axis of the base, depending therefrom and having a lubricant inlet adjacent the bottom of the container eccentrically of the axis of the container, a

piston in said cylinder, a piston rod for said piston, a. connecting rod for' reciprocating said piston rod having -one end extending through said base, a crank disc mounted above said base, means forming a driving connection between said motor and said disc for rotating said disc, an eccentrically disposed crank pin on said'disc, an offset arm operably connecting said vconnecting rod to said pin whereby operation of the motor ac tuates said piston, a casing over said disc disposed to receive lubricant from said cylinder, means communicating with said casing for receiving and dispensing lubricant therefrom. Y

6. In a'lubricating apparatus of the class described, a supporting base including a cir-k cular bearing portion adapted to be placed concentrically over a large opening in the upper end of a lubricant container, a motor mounted on said base, a pump cylinder on said base eccentrically of the axis of the base, depending therefrom and having a lubricant rinlet adjacent the bottom ofthe container eccentrically of the axis of the'container', la piston in said cylinder, a piston rod for said y piston, a connecting rod for reciprocating said piston rod having one end extending. 1

through said base, a crank disc mounted above said fbase, nieansorming a driving connection between said motor and'said disc for rotating said disc, an'eccentrical'ly disposedcrank pin on'said disc,an .offset-arm operably connecting said connecting rod to said pin whereby operation of vthe motor actuates said piston, a casingoversaid disc disposed'to receive lubricant from said cylinder, means communicating with said casing for receiving and dispensing lubricant therefrom, a partition extending through said casing forming an overilow compartment coinmunicating with said container and yieldingly held valve means normally closing an opening through said partition adapted to yield upon subjection to a predetermined pressure to permit the return of lubricant to said container. y

In witness whereof, I liereunto'subscribe my name this 10th day of October, 1928.

Y ERNEST WV. DAVIS.

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